Improvement in grain-drills



H. A. & L.B. MYERS.

Grain-Drill.

Patented June 25, 1861.

Inventor: W m

Witnesses= UNITED STATES PATENT OFFICE.

H. A. MYERS AND L. B. MYERS, OF ELMORE, OHIO.

IMPROVEMENT IN GRAIN-DRILLS.

Specification forming part of Letters Patent No. 32,6 1I. dated June 25,1561.

To all whom it may concern:

Be it known that we, H. A. MYERs and L. B. MYERS, of Elmore, in thecounty of Ottawa and State of Ohio, have invented new and usefulImprovements in Grain-Drills; and we do hereby declare that thefollowing is a full and exact description thereof, reference being badto the accompanying drawings, and to the letters of reference markedthereon.

Figure 1 is a view in perspective. Fig. 2 is a view of the doublepiston; Fig. 3, a view of the upper piston; Fig. 4, a view of the loweror movable piston; Fig. 5, a set-screw; Fig. 6, a nut; Fig. 7, ametallic washer; Fig. 8, a gumdisk; Fig. 9, a view of the floor ofseed-box turned under side up. Figs. 10, 11 and 12 are sectional viewsof apertures through the floor 0t seed-box, with the conical shelf andpiston in their relative places.

Similar letters of reference indicate corresponding parts in the severalfigures.

Our invention consists in a novel method of measuring and striking offgrain without the aid of brushes or gum, in making a double discharge ofthe grain after being measured oh", and in novel hinges and connectionswith lever for raising and keeping up the lifting-board and throwing inand out of gear.

a is the seed box; I), the frame; a, the lifting-board, which is securedat both ends to the frame by hinges d and d which are so formed as toplace the board 0 when down entirely behind and when up entirely infront of their centers orjoints, and when turned up in a lineperpendicular will remain up of itself, while its own weight and that ofthe fluke draw it still farther over center against the box. The upperend of hinge d expands into an eccentric ear, and with arm 6 forms acircular slot or jaw, f, which receives and firmly holds the one end oflever y, when the lifting-board is turned down and the machine ready foroperation. Lever g, at the middle, works on ajoint or adjustable-capfulcrum, h, and at the other end connects by a'joint with an uprightarm, i, the upper end of which works by guides in a slot in the end ofseed-box a and forms'a bearing for the gear end of crank-shaft whichextends from one end of seed-box to the other.

70 is the pinion, on the one end of the crankshaft-j.

lie the pitman,which is slipped on shaft-j at one end and at the otherend connects with the upper end of double piston n by a movable joint.The joint pin m, projecting out each side for agitators, as shown inFigs. 2, 10, 11, and 12.

n and n constitute the double piston n,which together form twoadjustable cavities, 0, diametrically opposite each other, of somewhat adiamond shape. Each cavity converges at both upper and lower end into anarrow and shallow groove and 19 The pistons n and n are held together,and the cavities 0 enlarged to any size required, by means of set-screwg, which works by a swiveljoint, to which a uniform tension is given tokeep the screw from turning of itself by an elastic disk, 1', placedbetween the end of piston 12 and not 8, with a metallic washer, t,placed under the nut to protect the disk against friction.

to is a metallic aperture through the floor of the seed-box, in whichdouble piston it operates up and down, as shown in Figs. 10,11, and 12.

'v is the conical shelf whose base is attached to the under side offloor of seed-box around the double piston n, at one of the sidesprovided with a cavity, 0 as shown in Figs. 9,10, 11. and 12.

Operation: When motion is given to the pinion, crank-shaftj, revolvesround and imparts a straight up-and-down motion to double piston a. Whenthe piston is up, as shown in Fig. 10, cavities 0 fill with seed. As thepiston moves down to the position shown in Fig. 11, the edges of theaperture stroke off cavities 0 and slide the excess of grain along theoblique edges of the cavities 0 to the narrow shallow grooves p andallow it to escape without injury. In this position cavities o areclosed from above and below with the exception of the grooves p and 132,which are only deep enough and wide enough to allow a grain to escape inclosing off without breaking same, but not to leak. When cavities 0 havepassed down through the aperture, as shown in Fig. 12, cavity 0 0n theone side discharges direct, while that on the other side discharges intothe pocket formed by the piston when down with conical shelf '0, asshown in Fig. 12, which opens and discharges on the return motion of thepiston, as shown in Fig. 10. The grain thus struck off by metallicsurfaces and discharged up and down with rapidity is measured anddistributed with more than ordinary We claimprecision and uniformity. Inturning up lift- The conical shelf '11, with the up-and-down ing-board 0the eccentric of hinge d bears movement ofthe pistoxnas and forthepnrpose down the end of lever g and raises up the shaft described.

and pinion for ungearing. At the same time H. A. MYERS. the fluke israised up, and by letting the board 11. B. MYERS. down arm 6 of binge ddirects end of lever g In presence ofintojawfand draws down shaft andpinion for E. A. HAINES,

gearing. M. K. DERSHAM.

